How to create curved glass
From Platinum Arts Sandbox Free 3D Game Maker
To create curved glass:
1. Choose a color from the FBP-Colored Tiles section (tabs 3-5)
2. Create geometry with said texture.
3-4. Curve as necessary, add alpha material (highlight, /alpha or F3->Alpha). Or add alpha, then curve.
5. Use /valpha to change degree of transparency as desired.